Concurrent State Machine Processing Using a Blockchain

4. The computer-implemented method according to claim 3, wherein the state corresponding to the first output and the state corresponding to the second output are the same.

5. The computer-implemented method according to claim 3, wherein the state corresponding to the first output and the state corresponding to the second output are different states.

7. The computer-implemented method according to claim 6, wherein the restriction on the input requires the input to reference the state machine in the first state and to reference the other state machine in another state different from the first state.

12. The computer-implemented method according to claim 11, wherein the set of elements of the smart contract is obtained from another blockchain transaction.

13. The computer-implemented method according to claim 1, wherein the set of script elements causes the unlocking transaction to comply with both the restriction on the input of the unlocking transaction and the restriction on the output of the unlocking transaction.

15. A non-transitory computer-readable storage medium having stored thereon executable instructions that, as a result of being executed by a processor of a computer system, cause the computer system to at least perform the computer-implemented method according to claim 1.